Cosmetic composition for treating keratin substances, comprising at least one grafted silicone polymer and at least one aqueous dispersion of insoluble particles of nonionic or cationic polymer

ABSTRACT

The present invention relates to a cosmetic or dermatological composition for the treatment of keratinous materials, particularly hair, comprising in a cosmetically or dermatalogically exceptable medium at least a grafted silicone polymer with a polysiloxanic skeleton grafted by organic non silicone monomers and at least an aqueous dispersions of insoluble particles of non ionic or cationic polymer. The compositions of the invention are used particularly as rinsed products or as non rinsed products particularly for hair washing, hair care, hair conditioning, hair dressing or hair setting.

[0001] The present invention relates to a cosmetic or dermatologicalcomposition for treating keratin substances, in particular the hair,comprising at least one grafted silicone polymer with a polysiloxaneskeleton-grafted with non-silicone organic monomers, and at least oneaqueous dispersion of insoluble particles of nonionic or cationicpolymer.

[0002] It has been proposed to use aqueous dispersions of insolublepolymer particles in compositions for maintaining the hairstyle.However, is the results obtained hitherto are still not satisfactory.The reason for this is that the fixing power is still not sufficient,the drying time is long and the cosmetic properties are still notsatisfactory. Furthermore, the polymer is difficult to remove from thehair during washing with a shampoo.

[0003] Polymers with a polysiloxane skeleton grafted with non-siliconeorganic monomers are also known in the prior art. They are preferablychosen from those described in patent applications EP-A-0,582,152 and WO93/23009. They are used in particular in hair compositions for theirstyling properties.

[0004] Compositions for washing and/or caring for and/or treating thehair containing styling polymers of this type in their formulationgenerally have the drawback of having a fixing power which is stillinsufficient.

[0005] The expression fixing power of the composition will be understoodto denote the ability of this composition to give the hair cohesion suchthat the initial shape of the hairstyle is retained.

[0006] Compositions are thus still sought which do not have thedrawbacks described above.

[0007] The Applicant has discovered, surprisingly, that by combining atleast one silicone polymer having a polysiloxane skeleton grafted withnon-silicone organic monomers with at least one dispersion of insolubleparticles of nonionic or cationic polymer, the abovementioned drawbacksare overcome.

[0008] These compositions have good fixing power and good cosmeticproperties such as disentangling and styling or brushing of the hairafter application, the softness, the feel and the smoothness of thehair.

[0009] The composition according to the invention is thus essentiallycharacterized in that it comprises, in a cosmetically ordermatologically acceptable medium, at least one grafted siliconepolymer with a polysiloxane skeleton grafted with non-silicone organicmonomers and at least one dispersion of insoluble particles of nonionicor cationic polymer.

[0010] In the following text, in accordance with what is generallyaccepted, the term silicone polymer is understood to denote anyorganosilicon polymer or oligomer having a linear or cyclic, branched orcrosslinked structure of variable molecular weight, obtained bypolymerization and/or polycondensation of suitably functionalizedsilanes, and consisting essentially of a repetition of main units inwhich the silicon atoms are linked together by oxygen atoms (siloxanebonding ≡Si—O—Si≡), optionally substituted hydrocarbon radicals beinglinked directly via a carbon atom to the said silicon atoms. The mostcommon hydrocarbon radicals are alkyl radicals, especially C₁-C₁₀ alkylradicals, and in particular methyl, fluoroalkyl radicals, aryl radicalsand in particular phenyl, and alkenyl radicals and in particular vinyl;other types of radicals which can be linked, either directly or via ahydrocarbon radical, to the siloxane chain are, especially, hydrogen,halogens and in particular chlorine, bromine or fluorine, thiols, alkoxyradicals, polyoxyalkylene (or polyether) radicals and in particularpolyoxyethylene and/or polyoxypropylene, hydroxyl or hydroxyalkylradicals, substituted or unsubstituted amine groups, amide groups,acyloxy radicals or acyloxyalkyl radicals, hydroxyalkylamino oraminoalkyl radicals, quaternary ammonium groups, amphoteric or betainegroups, anionic groups such as carboxylates, thioglycolates,sulphosuccinates, thiosulphates, phosphates and sulphates, needless tosay this list not being limiting in any way (so-called “organomodified”silicones).

[0011] According to the present invention, the grafted siliconepolymer(s) which is (are) to be used is (are) that (those) whichcomprise(s) a main silicone (or polysiloxane (≡Si—O—)_(n)) chain onwhich is grafted, inside the said chain as well as, optionally, on atleast one of its ends, at least one organic group containing nosilicone.

[0012] These silicone polymers can be existing commercial products oralternatively can be obtained according to any means known to thoseskilled in the art, in particular by reaction between (i) a startingsilicone which is correctly functionalized on one or more of thesesilicon atoms, and (ii) a non-silicone organic compound which is itselfcorrectly functionalized with a function which is capable of reactingwith the functional group(s) borne by the said silicone, forming acovalent bond; a classic example of such a reaction is thehydrosilylation reaction between ≡Si—H groups and vinyl groups CH₂═CH—,or alternatively the reaction between thio functional groups —SH withthese same vinyl groups.

[0013] Examples of silicone polymers which are suitable for carrying outthe present invention, as well as their specific mode of preparation,are described in particular in patent applications EP-A-0,582,152, WO93/23009 and WO 95/03776, the teachings of which are included in theirentirety in the present description by way of non-limiting references.

[0014] According to a particularly preferred embodiment of the presentinvention, the silicone polymer used comprises the result of the radicalcopolymerization between, on the one hand, at least one non-siliconeanionic organic monomer having ethylenic unsaturation and/or anon-silicone hydrophobic organic monomer having ethylenic unsaturation,and, on the other hand, a silicone having in its chain at least onefunctional group capable of reacting with the said ethylenicunsaturations of the said non-silicone monomers, forming a covalentbond, in particular thio functional groups.

[0015] According to the present invention, the said anionic monomerscontaining ethylenic unsaturation are preferably chosen, alone or as amixture, from linear or branched, unsaturated carboxyllc acids,optionally partially or totally neutralized in the form of a salt, itbeing possible for this (these) carboxylic acid(s) to be, moreparticularly, acrylic acid, methacrylic acid, maleic acid, maleicanhydride, itaconic acid, fumaric acid and crotonic acid. The suitablesalts are, in particular, alkali metal salts, alkaline-earth metal saltsand ammonium salts. It will likewise be noted that, in the final graftedsilicone polymer, the organic group of anionic nature which comprisesthe result of the radical (homo)polymerization of at least one anionicmonomer of unsaturated carboxylic acid type can, after reaction, bepost-neutralized with a base (sodium hydroxide, aqueous ammonia, etc) inorder to bring it into the form of a salt.

[0016] According to the present invention, the hydrophobic monomerscontaining ethylenic unsaturation are preferably chosen, alone or as amixture, from acrylic acid esters of alkanols and/or methacrylic acidesters of alkanols. The alkanols are preferably C₁-C₁₈ and moreparticularly C₁-C₁₂. The preferred monomers are chosen from the groupconsisting of isooctyl (meth)acrylate, isononyl (meth)acrylate,2-ethylhexyl (meth)acrylate, lauryl (meth)acrylate, isopentyl(meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, methyl(meth)acrylate, tert-butyl (meth)acrylate, tridecyl (meth)acrylate andstearyl (meth)acryiate, or mixtures thereof.

[0017] One family of grafted silicone polymers which is particularlysuitable for carrying out the present invention consists of siliconepolymers containing in their structure the unit of formula (I) below:

[0018] in which the radicals G₁, which may be identical or different,represent hydrogen or a C₁-C₁₀ alkyl radical or alternatively a phenylradical; the radicals G₂, which may be identical or different, representa C₁-C₁₀ alkylene group; G₃ represents a polymer residue resulting fromthe (homo)polymerization of at least one anionic monomer containingethylenic unsaturation; G₄ represents a polymer residue resulting fromthe (homo)polymerization of at least one hydrophobic monomer containingethylenic unsaturation; m and n are equal to 0 or 1; a is an integerranging from 0 to 50; b is an integer which may be between 10 and 350, cis an integer ranging from 0 to 50; with the proviso that one of theparameters a and c is other than 0.

[0019] Preferably, the unit of formula (I) above has at least one, andeven more preferably all, of the following characteristics:

[0020] the radicals G₁ denote an alkyl radical, preferably the methylradical;

[0021] n is non-zero and the radicals G₂ represent a divalent C₁-C₃radical, preferably a propylene radical;

[0022] G₃ represents a polymeric radical resulting from the(homo)polymerization of at least one monomer of the carboxylic acid typecontaining ethylenic unsaturation, preferably acrylic acid and/ormethacrylic acid;

[0023] G₄ represents a polymeric radical resulting from the(homo)polymerization of at least one monomer of the C₁-C₁₀ alkyl(meth)acrylate type, preferably of the isobutyl or methyl (meth)acrylatetype.

[0024] Examples of silicone polymers corresponding to formula (I) are,in particular, polydimethylsiloxanes (PDMS) on which are grafted, via athiopropylene-type connecting chain, mixed polymer units of thepoly(meth)acrylic acid type and of the polymethyl (meth)acrylate type.

[0025] Other examples of silicone polymers corresponding to formula (I)are, in particular, polydimethylsiloxanes (PDMS) on which are grafted,via a thiopropylene-type connecting chain, polymer units of thepolyisobutyl (meth)acrylate type.

[0026] Preferably, the number-average molecular mass of the siliconepolymers of the invention, ranges approximately from 10,000 to 1,000,000and even more preferably approximately from 10,000 to 100,000.

[0027] The grafted silicone polymers in accordance with the inventionare preferably used in an amount ranging from 0.01 to 20% by weightrelative to the total weight of the composition. More preferably, thisamount ranges from 0.1 to 15% by weight and even more particularly from0.5 to 10% by weight.

[0028] The aqueous dispersions of insoluble particles of nonionic orcationic polymer which can be used according to the invention aregenerally obtained by suspension or emulsion polymerization orcopolymerization of monomers according to processes that are well knownin the prior art (such dispersions are also known as “latices”). Aqueouspolymer dispersions can also be obtained by dissolving the said polymerin a water-miscible organic solvent, after which water is added andlastly the organic solvent is evaporated off. This type of preparationis described, for example, in French patent application No. 2,697,160.

[0029] The average diameter of the insoluble polymer particles isgenerally less than 500 nm and preferably less than 250 nm. The glasstransition temperature is generally between −30° C. and 90° C. andpreferably between 10 and 35° C.

[0030] The polymer of the aqueous dispersion comprises at least onemonomer chosen, for example, from styrene, butadiene, ethylene,tetrafluoroethylene, propylene, vinyltoluene, vinyl propionate, vinylalcohol, acrylonitrile, chloroprene, vinyl chloride, vinyl acetate,urethanes, isoprene, isobutene and esters or amides of acrylic,methacrylic, maleic, crotonic or itaconic acid, vinyl ethers,vinylpyrrolidone, vinylimidazole, trimethylammonioethyl (meth)acrylateand mixtures thereof.

[0031] The aqueous dispersions which can be used according to theinvention can come from the condensation of ionic or nonionic monomersgiving nonionic or cationic polymers, such as, for example, polyesters,polyamides, polyurethanes or polyethers.

[0032] The nonionic polymers in the aqueous dispersions which can beused according to the present invention are chosen, for example, fromthe following compounds:

[0033] vinyl acetate homopolymers such as the product sold under thename Appretan EM by the company Hoechst or the product sold under thename Rhodopas A 012 by the company Rhone-Poulenc;

[0034] copolymers of vinyl acetate and of acrylic ester, such as theproduct sold under the name Rhodopas AD 310 by Rhône-Poulenc;

[0035] copolymers of vinyl acetate and of ethylene, such as the productsold under the name Appretan TV by the company Hoechst;

[0036] copolymers of vinyl acetate and of maleic ester, for example ofdibutyl maleate, such as the product sold under the name Appretan MBExtra by the company Hoechst;

[0037] vinyl chloride homopolymers, such as the products sold under thenames Geon 460×45, Geon 460×46 and Geon 577 by the company Goodrich;

[0038] polyethylene waxes, such as the products sold under the namesAquacer 513 and Aquacer 533 by the company Byk Cera;

[0039] polyethylene/polytetrafluoroethylene waxes, such as the productssold under the names Drewax D-3750 by the company Drew Ameroid and WaxDispersion WD-1077 by the company R.T. Newey;

[0040] copolymers of polyethylene and of maleic anhydride;

[0041] alkyl acrylate homopolymers and alkyl methacrylate homopolymers,such as the product sold under the name Micropearl RQ 750 by the companyMatsumoto or the product sold under the name Luhydran A 848 S by thecompany BASF;

[0042] copolymers of acrylic esters such as, for example, copolymers ofalkyl acrylates and of alkyl methacrylates, such as the products sold bythe company Rohm & Haas under the names Primal ACZ 61 k and Eudragit NE30 D, by the company BASF under the names Acronal 601, Luhydraw LR 8833or 8845, and by the company Hoechst under the names Appretan N 9213 orN9212;

[0043] copolymers of acrylonitrile and of a nonionic monomer chosen, forexample, from butadiene and alkyl (meth)acrylates; mention may be madeof the products sold under the names Nipol LX 531 B by the companyNippon Zeon or those sold under the name CJ 0601 B by the company Rohm &Haas;

[0044] styrene homopolymers such as the product Rhodopas 5051 sold bythe company Rhône-Poulenc;

[0045] copolymers of styrene and of alkyl (meth)acrylate, such as theproducts Mowilith LDM 6911, Mowilith DM 611 and Mowilith LDM 6070 soldby the company Hoechst, the products Rhodopas SD 215 and Rhodopas DS 910sold by the company Rhone-Poulenc and the product Uramul SC 70 sold bythe company DSM;

[0046] copolymers of styrene, of alkyl methacrylate and of alkylacrylate, such as the product Daitisol SPA sold by the company Wacker;

[0047] copolymers of styrene and of butadiene, such as the productsRhodopas SB 153 and Rhodopas SB 012 sold by the company Rhône-Poulenc;

[0048] copolymers of styrene, of butadiene and of vinylpyridine, such asthe products Goodrite SB Vinylpyridine 2528×10 and Goodrite SBVinylpyridine 2508 sold by the company Goodrich;

[0049] copolymers of styrene and of vinylpyrrolidone, such as theproducts Antara 450 and Cloud 285 sold by the company ISP;

[0050] polyurethanes, such as the products sold under the names AcrysolRM 1020 or Acrysol RM 2020 by the company Rohm & Haas and the productsUraflex XP 401 UZ and Uraflex XP 402 UZ by the company DSM Resins;

[0051] copolymers of alkyl acrylate and of urethane, such as the product8538-33 from the company National Starch;

[0052] polyamides, such as the product Estapor LO 11 sold by the companyRhône-Poulenc.

[0053] The dispersions of insoluble particles of cationic polymercomprise, for example, the following polymers:

[0054] copolymers of acrylamide and of trimethylammonioethyl(meth)acrylate;

[0055] copolymers of alkyl methacrylate, of alkyl acrylate and oftrimethylammonioethyl (meth)acrylate, such as the product Eudragit RL 30D sold by the company Rohm Pharma.

[0056] The aqueous dispersions of insoluble polymer particles which areparticularly preferred in the context of the invention are aqueousdispersions of insoluble particles of nonionic polymer.

[0057] The weight concentration of the insoluble polymer particles inthe compositions according to the invention is preferably between 0.1and 50% by weight relative to the total weight of the composition, andpreferablybetween 1 and 30%.

[0058] The cosmetically or dermatologically acceptable medium preferablyconsists of water or a mixture of water and cosmetically acceptablesolvents such as monoalcohols, polyalcohols, glycol ethers or fatty acidesters, which can be used alone or as a mixture.

[0059] Mention may be made more particularly of lower alcohols such asethanol and isopropanol, polyalcohols such as diethylene glycol, glycolethers, glycol alkyl ethers or diethylene glycol alkyl ethers.

[0060] The grafted silicone polymers according to the invention can bedissolved in the said cosmetically acceptable medium or used in the formof an aqueous dispersion of insoluble particles.

[0061] The composition of the invention can also contain at least oneadditive chosen from thickeners, fatty acid esters, fatty acid esters ofglycerol, volatile silicones, surfactants, fragrances, preservingagents, sunscreens, proteins, vitamins, polymers, plant, animal, mineralor synthetic oils or any other additive conventionally used in thecosmetics field.

[0062] These additives are present in the composition according to theinvention in proportions which can range from 0 to 20% by weightrelative to the total weight of the composition. The precise amount ofeach additive depends on its nature and is determined easily by thoseskilled in the art.

[0063] Needless to say, a person skilled in the art will take care toselect the optional compound(s) to be added to the composition accordingto the invention such that the advantageous properties intrinsicallyassociated with the composition in accordance with the invention arenot, or are not substantially, adversely affected by the additionenvisaged.

[0064] The compositions according to the invention can be in the form ofa gel, a milk, a cream, a relatively thickened lotion or a mousse.

[0065] The compositions of the invention are used as rinse-out productsor as leave-in products in particular to wash, care for, condition,maintain the style of or shape keratin substances such as the hair.

[0066] These compositions are more particularly styling products such ashairsetting lotions, blow-drying lotions, fixing compositions (lacquers)and styling compositions. The lotions can be packaged in various forms,in particular in vaporizers, pump-dispenser bottles or in aerosolcontainers in order to ensure application of the composition invaporized form or in the form of a mousse. Such packaging forms areindicated, for example, when it is desired to obtain a spray, a lacqueror a mousse for fixing or treating the hair.

[0067] The compositions can also be shampoos, rinse-out or leave-incompositions, to be applied before or after shampooing, dyeing,bleaching, permanent-waving or straightening the hair.

[0068] When the composition according to the invention is packaged inaerosol form in order to obtain a lacquer or an aerosol mousse, itcomprises at least one propellant which can be chosen from volatilehydrocarbons such as n-butane, propane, isobutane, pentane, a chloroand/or fluoro hydrocarbon, and mixtures thereof. Carbon dioxide, nitrousoxide, dimethyl ether, nitrogen or air, which is compressed, andmixtures thereof, can also be used as propellant.

[0069] Another subject of the invention is a process for treatingkeratin substances such as the hair, which consists in applying acomposition as defined above to the hair and then optionally in rinsingwith water.

[0070] The invention will now be illustrated more fully with the aid ofthe examples which follow, which should not be considered as limiting itto the embodiments described. In the text which follows, AM means activematerial.

EXAMPLE 1 Styling Aerosol Spray

[0071] Grafted silicone polymer of formula (I) 3 g ofpolymethyl/methylsiloxane structure containing 3-propylthiopolymethacrylic acid groups and 3-propylthio polymethyl methacrylategroups Vinyl acetate homopolymer as an aqueous 4 g AM dispersioncontaining 50% AM, sold under the name Appretan EM by the companyHoechst

[0072] Aminomethylpropanol, qs 100% neutralization of the graftedsilicone polymer Dimethyl ether 30 g Water qs 100 g

[0073] The composition is pressurized as an aerosol.

[0074] This composition was applied to dried hair, the hair then havinga good feel, good maintenance and good hold over time.

[0075] The composition is easily removed on shampooing.

EXAMPLE 2 Styling Aerosol Spray

[0076] Grafted silicone polymer of formula (I) 4 g ofpolymethyl/methylsiloxane structure containing 3-propylthiopolymethacrylic acid groups and 3-propylthio polymethyl methacrylategroups Copolymer of styrene and of butadiene as 2 g AM an aqueousdispersion containing 50% AM, sold under the name Rhodopas SB 012 by thecompany Rhône-Poulenc

[0077] Aminomethylpropanol, qs 100% neutralization of the graftedsilicone polymer Dimethyl ether 30 g Water qs 100 g

[0078] The composition is pressurized as an aerosol.

[0079] This composition was applied to dried hair, the hair then havinga good feel, good maintenance and good hold over time.

[0080] The composition is easily removed on shampooing.

1. Cosmetic or dermatological composition intended for treating keratinsubstances, characterized in that it comprises, in a cosmetically ordermatologically acceptable medium, at least one grafted siliconepolymer with a polysiloxane skeleton grafted with non-silicone organicmonomers and at least one aqueous-dispersion of insoluble particles ofnonionic or cationic polymer.
 2. Composition according to claim 1,characterized in that the grafted silicone polymer comprises a mainpolysiloxane chain on which is grafted, inside the said chain as wellas, optionally, on at least one of its ends, at least one organic groupcontaining no silicone.
 3. Composition according to claim 1 or 2,characterized in that the grafted silicone polymer can be obtained byradical copolymerization between, on the one hand, at least onenon-silicone anionic organic monomer having ethylenic unsaturationand/or a non-silicone hydrophobic organic monomer having ethylenicunsaturation, and, on the other hand, a polysiloxane having in its chainat least one, and preferably several, functional groups capable ofreacting with the said ethylenic unsaturations of the said non-siliconemonomers.
 4. Composition according to claim 3, characterized in that theanionic organic monomer containing ethylenic unsaturation is chosen,alone or in the form of a monomer mixture, from linear or branchedunsaturated carboxylic acids.
 5. Composition according to claim 4,characterized in that the anionic organic monomer containing ethylenicunsaturation is chosen, alone or in the form of a monomer mixture, fromacrylic acid, methacrylic acid, maleic acid, maleic anhydride, itaconicacid, fumaric acid and crotonic acid or alkali metal, alkaline-earthmetal or ammonium salts thereof, or mixtures thereof.
 6. Compositionaccording to claim 3, characterized in that the hydrophobic organicmonomer containing ethylenic unsaturation is chosen, alone or as amonomer mixture, from acrylic acid esters of an alkanol and/ormethacrylic acid esters of an alkanol, the alkanol preferably beingC₁-C₁₈.
 7. Composition according to claim 6, characterized in that thehydrophobic organic monomer containing ethylenic unsaturation is chosen,alone or as a monomer mixture, from the group consisting of isooctyl(meth)acrylate, isononyl (meth)acrylate, 2-ethylhexyl (meth)acrylate,lauryl (meth)acrylate, isopentyl (meth)acrylate, n-butyl (meth)acrylate,isobutyl (meth)acrylate, methyl (meth)acrylate, tert-butyl(meth)acrylate, tridecyl (meth)acrylate and stearyl (meth)acrylate. 8.Composition according to any one of claims 1 to 7, characterized in thatthe grafted silicone polymer comprises, on the main silicone chain, atleast one organic group of anionic nature obtained by radical (homo)polymerization of at least one anionic monomer of unsaturated carboxylicacid type, partially or totally neutralized in the form of a salt. 9.Composition according to any one of claims 1 to 8, characterized in thatthe grafted silicone polymer is chosen from silicone polymers containingin their structure the unit of formula (I) below:

in which the radicals G₁, which may be identical or different, representhydrogen or a C₁-C₁₀ alkyl radical or alternatively a phenyl radical;the radicals G₂, which may be identical or different, represent a C₁-C₁₀alkylene group; G₃ represents a polymer residue resulting from the(homo)polymerization of at least one anionic monomer containingethylenic unsaturation; G₄ represents a polymer residue resulting fromthe (homo)polymerization of at least one hydrophobic monomer containingethylenic unsaturation; m and n are equal to 0 or 1; a is an integerranging from 0 to 50; b is an integer which may be between 10 and 350, cis an integer ranging from 0 to 50; with the proviso that one of theparameters a and c is other than
 0. 10. Composition according to claim9, characterized in that the unit of formula (I) has at least one of thefollowing characteristics: the radicals G₁ denote a C₁-C₁₀ alkylradical; n is non-zero and the radicals G₂ represent a divalent C₁-C₃radical; G₃ represents a polymeric radical resulting from the(homo)polymerization of at least one monomer of the carboxylic acid typecontaining ethylenic unsaturation; G₄ represents a polymeric radicalresulting from the (homo)polymerization of at least one monomer of theC₁-C₁₀ alkyl (meth)acrylate type.
 11. Composition according to claim 9or 10, characterized in that the unit of formula (I) simultaneously hasthe following characteristics: the radicals G₁ denote a methyl radical;n is non-zero and the radicals G₂ represent a propylene radical; G₃represents a polymeric radical resulting from the (homo)polymerizationof at least acrylic acid and/or methacrylic acid; G₄ represents apolymeric radical resulting from the (homo)polymerization of at leastmethyl (meth)acrylate.
 12. Composition according to any one of claims 1to 11, characterized in that the number-average molecular mass of thegrafted silicone polymer ranges approximately from 10,000 to 1,000,000,and even more preferably approximately from 10,000 to 100,000. 13.Composition according to any one of the preceding claims, characterizedin that the grafted silicone polymer(s) is (are) present inconcentrations ranging from 0.01 to 20% by weight relative to the totalweight of the composition, preferably from 0.1 to 15% by weight and moreparticularly from 0.5 to 10% by weight.
 14. Composition according to anyone of the preceding claims, characterized in that the polymer of theaqueous dispersion comprises at least one monomer chosen from styrene,butadiene, ethylene, propylene, vinyltoluene, vinyl propionate, vinylalcohol, acrylonicrile, chloroprene, vinyl acetate, urethanes, isoprene,isobutene and esters or amides of acrylic, methacrylic, maleic, crotonicor itaconic acid, vinyl ether, vinylpyrrolidone, vinylimidazole,trimethylammonioethyl (meth)acrylate and mixtures thereof. 15.Composition according to any one of the preceding claims, characterizedin that the nonionic polymer of the aqueous dispersion is chosen frompolyesters, polyamides, polyurethanes and polyethers.
 16. Compositionaccording to any one of the preceding claims, characterized in that thenonionic polymer of the aqueous dispersion is chosen from: vinyl acetatehomopolymers; copolymers of vinyl acetate and of acrylic ester;copolymers of vinyl acetate and of ethylene; copolymers of vinyl acetateand of maleic ester; vinyl chloride homopolymers; polyethylene waxes;polyethylene/polytetrafluoroethylene waxes; copolymers of polyethyleneand of maleic anhydride; alkyl acrylate homopolymers and alkylmethacrylate homopolymers; copolymers of acrylic esters such as, forexample, copolymers of alkyl acrylates and of alkyl methacrylates;copolymers of acrylonitrile and of a nonionic monomer chosen, forexample, from butadiene and alkyl (meth)acrylates; styrene homopolymers;copolymers of styrene and of alkyl (meth)acrylate; copolymers ofstyrene, of alkyl methacrylate and of alkyl acrylate; copolymers ofstyrene and of butadiene; copolymers of styrene, of butadiene and ofvinylpyridine; copolymers of styrene and of vinylpyrrolidone; copolymersof alkyl acrylate and of urethane.
 17. Composition according to any oneof claims 1 to 14, characterized in that the cationic polymer of theaqueous dispersion is chosen from: copolymers of acrylamide and oftrimethylammonioethyl (meth) acrylate; copolymers of alkyl methacrylate,of alkyl acrylate and of trimethylammonioethyl (meth)acrylate. 18.Composition according to any one of the preceding claims, characterizedin that the weight concentration of the insoluble polymer particles isbetween 0.1 and 50% relative to the total weight of the composition. 19.Composition according to any one of the preceding claims, characterizedin that the weight concentration of the insoluble polymer particles isbetween 1 and 30% relative to the total weight of the composition. 20.Composition according to any one of the preceding claims, characterizedin that it also contains at least one additive chosen from the groupconsisting of thickeners, fatty acid esters, fatty acid esters ofglycerol, silicones, surfactants, fragrances, preserving agents,sunscreens, proteins, vitamins, polymers, plant, animal, mineral orsynthetic oils or any other additive conventionally used in thecosmetics field.
 21. Composition according to any one of the precedingclaims, characterized in that the cosmetically or dermatologicallyacceptable medium consists of water or a mixture of water and at leastone cosmetically acceptable solvent.
 22. Composition according to claim21, characterized in that the cosmetically acceptable solvents arechosen from the group consisting of monoalcohols, polyalcohols, glycolethers, fatty acid esters and mixtures thereof.
 23. Compositionaccording to any one of the preceding claims, characterized in that thekeratin substance is the hair.
 24. Composition according to any one ofthe preceding claims, characterized in that it is in the form of a gel,a milk, a cream, a more or less thickened lotion or a mousse. 25.Composition according to any one of claims 1 to 24, characterized inthat it is a styling product.
 26. Composition according to any one ofclaims 1 to 25, characterized in that it is a hair product chosen fromthe group consisting of shampoos; rinse-out or leave-in hair products tobe applied before or after shampooing, dyeing, bleaching,permanent-waving or straightening the hair.
 27. Composition according toany one of claims 1 to 26, characterized in that it is packaged in theform of a vaporizer, a pump-dispenser bottle or in an aerosol containerin order to obtain a spray, a lacquer or a mousse.
 28. Compositionaccording to any one of the preceding claims, characterized in that thegrafted silicone polymer is dissolved in the cosmetically ordermatologically acceptable medium or is used in the form of an aqueousdispersion of insoluble particles.
 29. Non-therapeutic process fortreating keratin substances, in particular the hair, characterized inthat it consists in applying a composition as defined according to anyone of claims 1 to 28 to the said substances and then optionally inrinsing with water.